Our site uses cookies necessary for its proper functioning. To improve your experience, other cookies may be used: you can choose to disable them. This can be changed at any time via the Cookies link at the bottom of the page.


PE-RT, a New Class of PE for Hot Water Pipes - 2004 [PE]

 

Plastic Pipes Conference Association # 2004 Milan

Damen

The development of a new family of PE materials with significantly improved processability and long term strength at high temperatures is discussed. These polymers form the basis for a new ISO class of polyethylene materialsĀ : PE-RT (Polyethylene of Raised Temperature resistance) for hot and cold water pipe applications. These materials have a unique molecular structure and crystalline microstructure, which provides excellent Long Term Hydrostatic Strength at high temperature without crosslinking the material. PE-RT type materials are successfully used in domestic hot and cold water piping systems for all applications. These materials provide significant process advantages to the converters, allowing high line speed pipe production. The first member of the PE-RT family is targeted at the heating pipe market (covered by ISO 10508 classes 4 and 5), providing excellent flexibility and ease of installation to the installer. A recently developed PE-RT type material offers still higher long-term strength at high temperature and further improved processability. This combination makes this resin particularly suitable for all-plastic plumbing pipe (class 1 & 2 of ISO 10508) and thin wall, high line speed extrusion. An example of the latter is in metal/plastic composite pipes. Pipes based on these materials can be connected via heat welding or by the use of mechanical fittings. This paper presents the material science and product design concepts that govern the high long-term hydrostatic strength at high temperatures. By controlling the molecular structure, the melt rheology and solid state properties can be influenced. This results in a unique balance of processability and hydrostatic strength. Further discussed are the product features and benefits of PE-RT materials. The paper shows examples of the application range for this type of products.

Please note that the whole article content is available on PPCA website only :

Related papers

2001 Munich : Ductile Failure and Delayed Necking in PE

Author(s) : Jivraj, Sehanobish, Dun, Damen, Wu, Zhou, Chen, Shulkin, Chudnovsky

Analysis of polyethylene (PE) pipes ductile failure (ballooning) suggests that it is directly related to the delayed necking phenomena and time to ductile failure of PE pipe can be evaluated as the time to delayed necking. The necking in polyethylene (PE) is studied under displacement control (ramp test) and load...

2001 Munich : PE-RT, A New Class of PE for Hot Water Pipes - 2001

Author(s) : Damen, Schramm, Quack, Sehanobish, Cham

Developments in catalyst and process technology have resulted in a new highly differentiated product family based on ethylene-Ī±-olefin copolymers. This paper reports on the key attributes of these materials. These polymers show superior Long Term Hydrostatic Strength at higher temperatures, without the need for...

Members of the Association

BOREALISBOROUGEFormosa Plastics CorporationHanwha TotalEnergiesINEOS O&PIRPCKorea Petrochemical IND. Co., LTD (KPIC)LyondellBasellORLEN UnipetrolPetroChina Dushanzi Petrochemical CompanyPRIME POLYMERSABICSCG Chemicals & Thai PolyethyleneSinopecTASNEE